Abstract
In the present paper, the higher-order shear deformation theories (HST6, HST9, HST11, HST12) and the conventional first-order theory (FST) are employed to develop finite element analysis methods using eight-noded isoparametric elements to study the bending, free vibration and impact behaviour of laminated composite plates. The present results, based on higher-order theories, compare well with those existing in the literature. The effects of various parameters, such as span to thickness ratios, support conditions and stacking sequences on the laminate response are investigated. It is revealed that the first-order theory provides reasonably dependable results for natural frequencies, contact force, impact response and velocity profile of impactor for both thin and thick laminates. However, the higher-order theories are needed to compute stresses accurately in thick laminates.
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